New High-Speed Multioutput Carry Look-Ahead Adders

In this brief, an efficient implementation of an 8-bit Manchester carry chain (MCC) adder in multioutput domino CMOS logic is proposed. The carries of this adder are computed in parallel by two independent 4-bit carry chains. Due to its limited carry chain length, the use of the proposed 8-bit adder module for the implementation of wider adders leads to significant operating speed improvement compared to the corresponding adders based on the standard 4-bit MCC adder module.

[1]  Kai Hwang,et al.  Computer arithmetic: Principles, architecture, and design , 1979 .

[2]  Huey Ling.  High Speed Binary Adder , 1981, IBM J. Res. Dev..

[3]  Stamatis Vassiliadis.  Recursive equations for hardwired binary adders , 1989 .

[4]  Martine D. F. Schlag,et al.  Analysis and design of CMOS Manchester adders with variable carry-skip , 1989, Proceedings of 9th Symposium on Computer Arithmetic.

[5]  I. Koren.  Computer arithmetic algorithms , 2018 .

[6]  Graham A. Jullien,et al.  Fast adders using enhanced multiple-output domino logic , 1997 .

[7]  G. A. Ruiz.  New static multi-output carry lookahead CMOS adders , 1997 .

[8]  Behrooz Parhami,et al.  Computer arithmetic - algorithms and hardware designs , 1999 .

[9]  Costas Efstathiou,et al.  Ling adders in CMOS standard cell technologies , 2002, 9th International Conference on Electronics, Circuits and Systems.

[10]  Stefania Perri,et al.  Fast and energy-efficient Manchester carry-bypass adders , 2004 .

[11]  Renato P. Ribas,et al.  Enhanced 32-bit carry look-ahead adder using multiple output enable-disable CMOS differential logic , 2004, Proceedings. SBCCI 2004. 17th Symposium on Integrated Circuits and Systems Design (IEEE Cat. No.04TH8784).

[12]  David Harris,et al.  CMOS VLSI Design: A Circuits and Systems Perspective , 2004 .

[13]  Gustavo A. Ruiz,et al.  An area-efficient static CMOS carry-select adder based on a compact carry look-ahead unit , 2004, Microelectron. J..

[14]  Giorgos Dimitrakopoulos,et al.  High-speed parallel-prefix VLSI Ling adders , 2005, IEEE Transactions on Computers.

[15]  Alaaeldin Amin.  Area-efficient high-speed carry chain , 2007 .